When will ZFS become stable?
kris at FreeBSD.org
Sun Jan 6 06:27:20 PST 2008
Ivan Voras wrote:
> Kris Kennaway wrote:
>> kmem problems are just tuning. They are not indicative of stability
>> problems in ZFS.
> I disagree - anything that causes a panic is a stability problem. Panics
> persist AFTER the tunings (for i386 certainly, and there are unsolved
> reports about it on amd64 also) and are present even when driving kmem
> size to the maximum. The tunings *can not solve the problems* currently,
> they can only delay the time until they appear, which, by Murphy, often
> means "sometime around midnight at Saturday".
That's an assertion directly contradicted by my experience running a
heavily loaded 8-core i386 package builder. Please explain in detail
the steps you have taken to tune your kernel. Do you have the vm_kern.c
> See also the possibility
> of deadlocks in the ZIL, reported by some users.
Yes, this is an outstanding issue. There are a couple of others I run
into in the above configuration, but kmem panics aren't among them.
>> Please report any further non-kmem panics you experience.
> I did, once to Pawel and once to the lists. Pawel couldn't help me and
> nobody responded on the lists. Can you perform a MySQL read-write
> benchmark on one of the 8-core machines with database on ZFS for about
> an hour without pause? On a machine with 2 GB (or less) of RAM,
> preferrably? I've seen problems on i386 but maybe they are also present
> on amd64.
I am not set up to test this right now.
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